EP 0185713 B1 19880525 - METHOD AND DEVICE FOR MODIFYING THE CROSS-SECTION OF A GALLERY, A TUNNEL OR THE LIKE
Title (en)
METHOD AND DEVICE FOR MODIFYING THE CROSS-SECTION OF A GALLERY, A TUNNEL OR THE LIKE
Publication
Application
Priority
DE 3421704 A 19840612
Abstract (en)
[origin: WO8600113A1] To modify a given profile of a gallery of the like, particularly a circular profile so as to give it the shape of a vault, a succession of deepenings are drilled in the longitudinal direction of the gallery into the wall by means of a drilling head (12) which is first displaced perpendicularly to the direction of the gallery. The deepenings are made in such a way that they overlap each other. A device for implementing such method comprises a feed device (18, 19, 28, 29) for moving in the direction of the gallery wall a drilling head (12) provided at its front end with tools.
IPC 1-7
IPC 8 full level
E21C 27/22 (2006.01); E21D 9/10 (2006.01)
CPC (source: EP US)
E21C 27/22 (2013.01 - EP US); E21D 9/1006 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE FR GB IT LI SE
DOCDB simple family (publication)
DE 3421704 A1 19851212; DE 3421704 C2 19860528; DE 3562936 D1 19880630; EP 0185713 A1 19860702; EP 0185713 B1 19880525; NO 860417 L 19860206; US 4696600 A 19870929; WO 8600113 A1 19860103
DOCDB simple family (application)
DE 3421704 A 19840612; DE 3562936 T 19850610; DE 8500199 W 19850610; EP 85902960 A 19850610; NO 860417 A 19860206; US 84804786 A 19860212